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HARNEX™ 320 Wind Turbine Gear Oil


HARNEX 320 wind turbine gear oil is a premium synthetic lubricant designed using polyalphaolefin (PAO) chemistry to provide exceptional anti-wear/EP performance for wind turbine gearboxes.


HARNEX 320 is approved by GE as a service fill oil for Platform 1.x and 2.x turbines with Winergy gearboxes. HARNEX 320 also meets the technical requirements of Shanghai Electric and is approved for use in any gearbox on a Shanghai Electric wind turbine.

The challenges facing the smooth operation of wind turbine transmissions are severe: high load and torque, temperature swings, corrosion, constant stops and starts and difficult access for maintenance. What is needed is a gear oil that stands up to these working conditions, while still reducing downtime and maintenance costs.

HARNEX™ 320 Wind Turbine Gear Oil is a premium synthetic lubricant designed to provide exceptional anti-wear/extreme pressure (AW/ EP) protection and corrosion control under the toughest conditions. HARNEX 320 is specially formulated for lubricating wind turbine gearboxes for effective operation and long service life.


HARNEX 320 is designed with polyalphaolefin (PAO) chemistry to deliver good oil film thickness over a broad temperature range. High viscosity index minimizes changes in viscosity at elevated temperatures, while ensuring good low temperature fluidity of the lubricant for cold temperature operation. This helps to ensure smooth operation in all types of climates: from the tropical heat of Costa Rica to the cold prairie winters of Canada

Features & Benefits

  • Protects against micropitting and scuffing of gear teeth and provides extended bearing life under extreme conditions

  • Withstands oxidative and thermal breakdown at elevated temperatures to increase time between drain intervals, saving time and labour

  • High quality synthetic base stocks with high VI ensure good lubricant film thickness over a broad temperature range

  • Low temperature fluidity ensures smooth coldtemperature starts

  • Effective water separation

  • Resists rust and corrosion

  • Excellent air release properties

  • Excellent compatibility with seals and coatings


HARNEX 320 meets the following industry specifications:

  • AGMA 9005-E02 (EP)

  • DIN 51517-3 (CLP 320)

  • ISO 12925-1 Type CKD



HARNEX 320 is approved by GE as a service re-fill oil for the following GE wind turbines:

  • Platform 1.X with Winergy gearbox

  • Platform 2.X with Winergy gearbox



Certified Petro-Canada Product

Duramach partner with Petro-Canada to supply world-class advanced lubricants, specialty fluids and greases developed from over 30 years of research and development.


Petro-Canada lubricants continue to perform beyond expectations in virtually every industry around the globe. 

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